Surface ornamentation for a helmet



FIG. 1 is a front and left side perspective view of a surface ornamentation for a helmet showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

In each of FIGS. 1-6, the broken lines showing structure are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a surface ornamentation for a helmet, as shown and described. 